Pregame Preview: Padres go for 2nd sweep in Arizona

PHOENIX  The Padres have a chance to reach a couple season highs Sunday afternoon at Chase Field.

They will be looking to win a seventh straight game for the first time this season while sweeping a series in Phoenix for only the second time ever – and the second time this season.

But the Padres won’t be facing left-hander Joe Saunders as expected. Saunders was traded to the Baltimore Orioles Sunday morning and Vista High grad Trevor Cahill will pitch against the Padres (1:10 p.m.; TV: Fox Sports San Diego; Radio: 1090-AM).

Before the game, Padres manager Bud Black confirmed that right-hander Casey Kelly will make his major league debut Monday night at Petco Park as the starting pitcher against the Atlanta Braves. Kelly, 22, came to the Padres in the 2010 trade that sent first baseman Adrian Gonzalez to the Red Sox. Kelly missed much of this season with an elbow strain.

Kelly will be the 15th pitcher to start a game for the Padres this season, tying the franchise record set in 2002 and tied in 2009.

Right-hander Edinson Volquez will face the Diamondbacks Sunday in the finale of the three-game series.

The Padres have won the first two games of the series 5-0 and 9-3. They currently are on their third, six-game winning streak of the season. They have also won six straight games at Chase Field, including all five played in Arizona this season.

Left fielder Carlos Quentin went 2-for-3 with his 14th homer Saturday night to extend his hitting streak to seven straight games. He is 9-for-24 during the streak with two doubles, two home runs, nine RBI and six runs scored. Three of his club-record 16 hit-by-pitches have also come during the seven-game hitting streak.

First baseman Yonder Alonso homered and hit a two-run single Saturday night while Chase Headley hit a solo homer and drove in a second run with a sacrifice fly.

Not only does Chase Headley had 10 homers and 28 RBI in August, he has 14 homers and 38 RBI since the All-Star break. The 14 homers tie Headley with Miguel Cabrera and Albert Pujols for the most homers in the major leagues since the All-Star break. And the 38 RBI lead the National League since the break and are second in the major leagues to Adrian Gonzalez’s 44 RBI.

PADRES (58-70) at DIAMONDBACKS (64-63)

Time: 1:10 p.m. Game: 3 of 3

TV: Fox Sports San Diego

Radio: 1090-AM, 860-AM (Spanish)

Today’s matchup

Padres RHP Edinson Volquez (8-9, 4.18 ERA)

Volquez vs. the Diamondbacks: 0-1 career, 4.15 ERA in five starts (0-0 this season, 2.77 ERA in two starts).

Volquez, 29, picked up his eighth win in his last start, holding the Pirates to one run on five hits over 6 2/3 innings. The win ended a run of four straight poor outings for Volquez, who was 1-2 in those starts with a 13.83 ERA. Over those four starts, Volquez gave up 21 runs on 22 hits, including five homers, in 13 2/3 innings. Volquez will be making his 27th start of the season. The Padres are 9-4 in his past 13 starts. Opponents are hitting .225 against Volquez, the eighth-lowest mark in the National League.